CN104107603A - Filter device for purifying high-temperature gas - Google Patents
Filter device for purifying high-temperature gas Download PDFInfo
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- CN104107603A CN104107603A CN201410331406.8A CN201410331406A CN104107603A CN 104107603 A CN104107603 A CN 104107603A CN 201410331406 A CN201410331406 A CN 201410331406A CN 104107603 A CN104107603 A CN 104107603A
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Abstract
The invention discloses a filter device for purifying high-temperature gas. A tube plate of the filter device is provided with a filter unit; the filter unit at least comprises a filter pipe; the tube plate divides a filter in a sealed manner into an upper clean gas chamber and a lower dust-containing gas chamber; the dust-containing gas chamber is provided with a gas inlet, and the clean gas chamber is provided with a gas outlet; the upper part of the filter unit is covered with an overhead device; the overhead device comprises a cylindrical outer cover; the bottom end of the cylindrical outer cover fixedly covers the filter unit; a porous filter element is fixed at the top end of the cylindrical outer cover; a through hole is formed in the porous filter element; a pulse back-blowing pipeline passes through the through hole and then extends into the cylindrical outer cover and is positioned above the filter unit. The filter device can achieve a safety protection function when the filter pipe is broken, dust-containing gas does not reach a clean gas side, and downstream equipment can be protected to further avoid influence on follow-up production processes; meanwhile, the phenomenon of'backflow' in the prior art can be overcome.
Description
Technical field
The invention relates to high temperature gas-solid isolation technics, relate in particular to a kind of filter for high temperature gas cleaning.
Background technology
In the industries such as chemical industry, oil, metallurgy, electric power, often produce high-temperature dusty gas; Because different process need to recover energy and reach environmental emission standard, all need these high-temperature dusty gas to carry out udst separation.Gas cleaning at high temperature is under hot conditions, directly to carry out gas solid separation, realizes a technology of gas purification, and it can farthest utilize the physics sensible heat of gas, potential chemical heat and kinetic force, improve energy utilization rate, process simplification, saves equipment investment simultaneously.
High temperature air filtration technology is acknowledged as the most potential high temperature gas-solid isolation technics, and this technology can be removed particles more than 5 μ m conventionally, and outlet process gas dust content is less than 5mg/Nm
3, separative efficiency reaches 99.9%.Can meet subsequent technique requirement.Take the micropore rigid filter element that sintered metal filtration pipe and ceramic filter tube be representative, there is the many merits such as high temperature resistant, antiacid caustic corrosion, good thermal shock, filtering accuracy height, therefore become the core parts of high-temperature gas filter.
During the work of micropore rigid filter pipe, by the outer surface of screen pipe, the micropore by filtering material enters in screen pipe dusty gas, solid particle in gas is trapped within on the outer wall of screen pipe, form dust layer, clean gas is discharged and is entered clean gas side by the openend of screen pipe, through gas vent, discharges and enters subsequent technique.Carrying out along with filter operation, the muffin layer progressive additive of screen pipe outer surface, cause the pressure drop of screen pipe to increase, at this moment need to adopt the mode of blowback to realize the quality rebuilding of screen pipe, the air-flow of blowback is contrary with the airflow direction of filtration, purge gas utilizes the energy of transient state that the dust layer of screen pipe outer surface is peeled off, and makes the resistance of screen pipe substantially return to original state, thereby realizes the quality rebuilding of screen pipe.The screen pipe shape of commercial Application mostly is cylindric at present, length 1m～2.5m, and one end sealing, other end opening, openend is provided with flange.Take ceramic filter tube as example explanation, the body of ceramic filter tube adopts double-decker, internal layer is the support body layer that average pore size is larger, be used for guaranteeing the intensity of screen pipe, the external diameter of support body layer is generally 60mm, the thickness of support body layer is 10～15mm, the grain diameter of support body layer is generally 200～350 microns, and add at the outer surface of support body layer the filtration rete that last layer average pore size is less, be used for tackling dust granules thing, to realize the surface filtration to dust granules, filter membrane layer thickness is about 150～200 μ m, the particle diameter that forms the particle that filters rete is about 15～30 μ m, filter pore average pore size approximately 10～15 μ m of rete.
But as the core parts of high-temperature gas filter, in rigid filter pipe running, usually there are the following problems:
(1) due to reasons such as operation fluctuation of operating conditions, pulse backblowing gas shock and the material behaviors of screen pipe own, in screen pipe running, usually there is the phenomenons such as damaged and fracture, when there is damaged or fracture in screen pipe, dust-laden process gas will directly enter clean gas side by screen pipe passage damaged or fracture, equipment to filter downstream causes damage, and has a strong impact on subsequent technique.
(2) research shows, when pulse backblowing approaches end, purge gas speed reduces gradually, in this process, the pressure of screen pipe inside is less than the pressure of its outside, near gas screen pipe outer wall there will be by pipe outside by tube wall " backflow " phenomenon to pipe flows inside, the solid particle that oneself is blown off through the pipe outer wall from screen pipe is deposited in its outer wall again, even wear the porous channel that is embedded to screen pipe inside, this " backflow " phenomenon can accelerate to stop up the porous channel of screen pipe, reduce the service life of screen pipe, be unfavorable for the stable operation of filter.
(3) because the dust concentration in industrial dust-laden process gas is higher, the speed of filtered airflow is also higher, the operating load of screen pipe is larger, the operation of this high load capacity can be accelerated the heat fatigue of screen pipe, the pressure drop of screen pipe is risen also very fast, pulse dust cleaning frequency is increased, and screen pipe bears more thermal shock, easily premature failure.
(4) the air-flow drag force near screen pipe openend during due to filter operation is larger, make along screen pipe axial, downward by top, filter the trend that gas speed is successively decreased in gradient, and Pulse Cleaning, when air pulse enters screen pipe inside, air pulse axial velocity along from screen pipe top to screen pipe bottom constantly reduces, and kinetic transformation is pressure energy, along the axis of screen pipe, top is to bottom, the trend that air pulse is increased progressively to gas speed in the process of flows outside in gradient by screen pipe inside.This phenomenon causes dust layer inhomogeneous along the axial distribution of screen pipe, also makes the ash-removal effect of Pulse Cleaning along the larger difference of axial existence of filtering screen pipe, is unfavorable for the long-period stable operation of screen pipe.
Thus, the inventor, by means of being engaged in experience and the practice of relevant industries for many years, proposes a kind of filter for high temperature gas cleaning, to overcome the defect of prior art.
Summary of the invention
The object of the present invention is to provide a kind of filter for high temperature gas cleaning; can be when there is damaged fracture in screen pipe; play the effect of safeguard protection; dusty gas can not enter clean gas side; can protect upstream device; and then do not affect subsequent production technique, overcome " backflow " phenomenon existing in prior art simultaneously.
Another object of the present invention is to provide a kind of filter for high temperature gas cleaning, can carry out pre-separation to entering the dusty gas of filter, reduce the operating load of screen pipe.
Another object of the present invention is to provide a kind of filter for high temperature gas cleaning, can improve the non-uniform phenomenon that has filtration and Pulse Cleaning in screen pipe running, extends the service life of screen pipe.
The object of the present invention is achieved like this, a kind of filter for high temperature gas cleaning, and described filter consists of filter, and the tube sheet of filter is provided with filter element, at least comprises a screen pipe in described filter element; Described tube sheet is divided into the clean gas chamber on top and the dusty gas chamber of bottom by filter seal, and dusty gas chamber is provided with gas access, and clean gas chamber is provided with gas vent; Filter element upper lid is established an overhead device; Described overhead device includes the cylindrical housing that a bottom fixed cover is located at filter element top, the top of this cylindrical housing is fixed with a porous filter elements, this porous filter elements is provided with a through hole, and pulse backblowing pipeline extends to the inside of this cylindrical housing through this through hole and is positioned at filter element top.
In a better embodiment of the present invention, between described dusty gas chamber and overhead device, be connected with differential pressure transmitter.
In a better embodiment of the present invention, described screen pipe is sintered metal filtration pipe or ceramic filter tube; Described porous filter elements is made by sintering metal powder, sintered metal mesh, sintered metal fiber or porous ceramic film material.
In a better embodiment of the present invention, the porosity of described porous filter elements is 3～8 times of the screen pipe porosity.
In a better embodiment of the present invention, described porous filter elements is the central portion identical with cylindrical housing internal diameter; The inwall on contiguous cylindrical housing top is provided with support ring, and this porous filter elements is placed on this support ring, and porous filter elements top arranges a pressure ring, and pressure ring is fixedly connected on the top outer rim of cylindrical housing.
In a better embodiment of the present invention, between pulse backblowing pipeline and the through hole of porous filter elements, be provided with sealing ring.
In a better embodiment of the present invention, described dusty gas cavity bottom is provided with the first ash bucket; The first ash bucket below is provided with ash-valve, and ash-valve below is provided with the second ash bucket.
In a better embodiment of the present invention, pulse backblowing pipeline is communicated in blowback air accumulator by pulse backblowing valve.
In a better embodiment of the present invention, described dusty gas chamber consists of a circular outer cylinder, is fixed with a up big and down small conically shaped in circular outer cylinder inside; The upper end outer wall of described conically shaped is fixedly connected with the upper end inner wall sealing of circular outer cylinder, and described filter element is positioned at conically shaped inner side; Described gas access comprises the first gas feed pipeline and the second gas feed pipeline; Described the first gas feed pipeline is connected in circular outer cylinder barrel, and described the second gas feed pipeline is connected in conically shaped barrel through circular outer cylinder; Described the first gas feed pipeline is connected on corresponding barrel in the identical tangential admission mode of rotation direction with the second gas feed pipeline; On the barrel of described conically shaped, along it, be circumferentially with two groups of skewed slot seams, every group of skewed slot seam forms by many long skewed slots that longitudinally arrange along conically shaped; Long skewed slot in the first skewed slot seam group is identical with the swirling eddy direction of conically shaped outside along the cut-out direction of conically shaped barrel ecto-entad; Long skewed slot in the second skewed slot seam group is identical with the swirling eddy direction of conically shaped inside along conically shaped barrel cut-out direction from inside to outside; Long skewed slot in long skewed slot in described the first skewed slot seam group and the second skewed slot seam group respectively interval arranges.
In a better embodiment of the present invention, the bottom of described conically shaped is provided with the anti-back-mixing cover of taper of flaring.
From the above mentioned, the present invention is for the filter of high temperature gas cleaning, can be when there is damaged fracture in screen pipe, play the effect of safeguard protection, dusty gas can not enter clean gas side, can protect upstream device, and then not affect subsequent production technique, overcome " backflow " phenomenon existing in prior art simultaneously; Meanwhile, can carry out pre-separation to entering the dusty gas of filter, reduce the operating load of screen pipe; Can improve the non-uniform phenomenon that has filtration and Pulse Cleaning in screen pipe running, extend the service life of screen pipe.
Accompanying drawing explanation
The following drawings is only intended to the present invention to schematically illustrate and explain, not delimit the scope of the invention.Wherein:
Fig. 1: be the structural representation of the present invention for the filter of high temperature gas cleaning.
Fig. 2: be the structural representation of overhead device in the present invention.
Fig. 3: be A-A sectional structure schematic diagram in Fig. 1.
Fig. 4: be the structural representation of conically shaped in the present invention.
Fig. 5: be B-B sectional structure schematic diagram in Fig. 4.
Fig. 6: be the airflow direction schematic diagram of screen pipe in the present invention in filter process.
Fig. 7: be the airflow direction schematic diagram of screen pipe in the present invention in Pulse Cleaning.
The specific embodiment
For technical characterictic of the present invention, object and effect being had more clearly, understand, now contrast accompanying drawing explanation the specific embodiment of the present invention.
As shown in Figure 1 and Figure 2, the present invention proposes a kind of filter for high temperature gas cleaning, described filter consists of filter 100, the tube sheet 1 of filter 100 is provided with filter element 2, in described filter element 2, at least comprise a screen pipe 21 (can comprise a plurality of screen pipes, the screen pipe of take in the present embodiment describes as example); Described tube sheet 1 is divided into the clean gas chamber a on top and the dusty gas chamber b of bottom by filter seal, and dusty gas chamber b is provided with gas access 3, and clean gas chamber a is provided with gas vent 4; Filter element 2 upper lid are established an overhead device 5; As shown in Figure 2, described overhead device 5 includes the cylindrical housing 51 that a bottom fixed cover is located at filter element 2 tops, the top of this cylindrical housing 51 is fixed with a porous filter elements 52, this porous filter elements 52 is provided with a through hole, and pulse backblowing pipeline 53 extends to the inside of this cylindrical housing 51 and is positioned at filter element 2 tops through this through hole.
The present invention for the filter of high temperature gas cleaning in use,
Dust-laden process gas is entered into the bottom dusty gas chamber b of filter by gas access 3, in filter operation process, dust adhesion is at the outer surface of screen pipe 21, increase along with running time, the thickness of dust layer increases gradually, the pressure drop of ceramic filter tube is increased, at this time need to adopt the mode of pulse backblowing to realize the quality rebuilding of screen pipe, pulse backblowing air-flow is contrary with the airflow direction of filtration, purge gas enters into the internal cavity of screen pipe through pulse valve and pulse backblowing pipeline 53, utilize the energy of transient state that the dust layer of screen pipe outside wall surface is peeled off, thereby realize its quality rebuilding.When screen pipe is due to reasons such as thermal shock fatigue or the increase of fluctuation of operating conditions load or self performance; while there is thermalfatigue failure fracture; by the overhead device 5 (that is: porous filter elements 52) that is positioned at screen pipe top, realize protection; dusty gas can not enter clean gas chamber a; thus; can protect upstream device, and then not affect subsequent production technique.
In the present embodiment, described screen pipe 21 is sintered metal filtration pipe or ceramic filter tube; Described porous filter elements 52, according to operating procedure, can be selected to be made by sintering metal powder, sintered metal mesh, sintered metal fiber or porous ceramic film material.The feature of this porous filter elements is that pressure drop resistance is little, the porosity is large, and (porosity of porous filter elements 52 is greater than the porosity of screen pipe 21, preferably range of choice is that the porosity of porous filter elements is 3～8 times of the screen pipe porosity), the resistance in the filter operation process of increase screen pipe 21 that so just can not be additionally too much, this porous filter elements 52 is different from the surface filtration performance of screen pipe, after screen pipe ruptures, dust-contained airflow enters behind the screen pipe inside of fracture, enter in this porous filter elements 52 porous channel when inner, dust can be deposited on the inside of this porous filter elements 52 gradually, and then its porous channel is stopped up, the dust that is deposited on this porous filter elements inside can not blown out from its inside by blowback air-flow yet, can reach self-packing effect, reached thus the object of safeguard protection, can effectively prevent that dusty gas from entering clean gas chamber and affecting subsequent technique, during parking maintenance, by this porous filter elements displacement, cost-saved.
In the present embodiment, between described dusty gas chamber b and the cylindrical housing 51 of overhead device, be connected with differential pressure transmitter 6, that is: the two ends pressure guiding pipe difference conducting of differential pressure transmitter 6, in dusty gas chamber b and cylindrical housing 51, carrys out the change in pressure drop in monitoring filtering pipe running by differential pressure transmitter.
Described porous filter elements 52 is the central portion identical with cylindrical housing 51 internal diameters; The inwall on contiguous cylindrical housing 51 tops is provided with support ring 54, and this porous filter elements 52 is placed on this support ring 54, and porous filter elements 52 tops arrange a pressure ring 55, and pressure ring 55 is fixedly connected on the top outer rim 56 of cylindrical housing; Between pulse backblowing pipeline 53 and the through hole of porous filter elements, be provided with sealing ring 57.Pulse backblowing pipeline 53 is communicated in blowback air accumulator (not shown) by pulse backblowing valve.
In the present embodiment, pulse backblowing pipeline 53 is deep into the inside of this cylindrical housing by through hole, and such set positions is very important, and at deashing process, pulse backblowing gas energy will all concentrate in this screen pipe, and then improves reverse gas cleaning efficiency; Simultaneously, after pulse backblowing finishes, when refluxing appears near gas screen pipe 21 outer walls, the speed of this backflow is very high, this porous filter elements 52 can significantly increase the mistake flow resistance of gas, hinder the reflux course of gas, thereby avoided when deashing closes to an end, because backflow effect causes the outer granule of screen pipe to be again deposited to screen pipe 21 outside wall surface or to wear, be embedded into screen pipe 21 inside.At this, it should be noted that, in actual filter process, the gas speed of filtration is lower, is about 3～7m/s, because the rate of filtration is low, so the filtration resistance that the porous filter elements 52 in the present invention causes impact almost can be ignored; And the speed refluxing is very high, about 70～150m/s, so backflow phenomenon can obviously be inhibited.
Further, in the present embodiment, as shown in Figure 1, described dusty gas chamber b consists of a circular outer cylinder 7, is fixed with a up big and down small conically shaped 8 in circular outer cylinder 7 inside; The upper end outer wall of described conically shaped 8 is fixedly connected with the upper end inner wall sealing of circular outer cylinder 7, and described filter element 2 is positioned at conically shaped 8 inner sides; Circular outer cylinder 7 bottoms are connected with the first ash bucket 71; The first ash bucket 71 belows are provided with ash-valve 73, and ash-valve 73 belows are provided with the second ash bucket 72.
As shown in Figure 1, described gas access 3 comprises the first gas feed pipeline 31 and the second gas feed pipeline 32; Described the first gas feed pipeline 31 is connected in the barrel (that is: the annular space conducting between the first gas feed pipeline 31 and circular outer cylinder 7 and conically shaped 8) of circular outer cylinder 7, and described the second gas feed pipeline 32 is connected in conically shaped 8 barrels (that is: the second gas feed pipeline 32 and conically shaped 8 inner space conductings) through circular outer cylinder 7; As shown in Figure 3, described the first gas feed pipeline 31 is connected on corresponding barrel in the identical tangential admission mode of gas rotation direction importing with the second gas feed pipeline 32; The mode of this tangential admission, is the inside that the air flow direction that rotates enters filter, can directly to screen pipe 21, not cause gas shock, is conducive to protect screen pipe; When dust-laden process gas adopts the mode of tangential admission to enter into filter interior by the first gas feed pipeline 31 and the second gas feed pipeline 32 respectively simultaneously, the direction of motion of air-flow flows according to the direction of arrow shown in Fig. 3; In Fig. 3, c is the gas rotation direction being flowed into by the first gas feed pipeline 31, and d is the gas rotation direction being flowed into by the second gas feed pipeline 32; Two airflow directions are identical flow direction (that is: simultaneously for counterclockwise, or being simultaneously clockwise), take and be all counterclockwise as example describes in Fig. 3.Wherein, the dusty gas being entered by the first gas feed pipeline 31, enters into the circular outer cylinder 7 of filter and the annular space between conically shaped 8, and the dusty gas being entered by the second gas feed pipeline 32 enters into the inner space of this conically shaped 8;
As shown in Figure 4, Figure 5, on the barrel of described conically shaped 8, along it, be circumferentially with the first skewed slot seam group 81 and the second skewed slot seam group 82, the first skewed slot seam group 81 consists of many first long skewed slots 811 that longitudinally arrange along conically shaped 8, and the second skewed slot seam group 82 consists of many second long skewed slots 821 that longitudinally arrange along conically shaped 8; The first long skewed slot 811 along the angular cutouts direction of conically shaped 8 barrel ecto-entads identical with the swirling eddy direction of conically shaped outside (that is: with the first gas feed pipeline 31 in gas rotation direction c identical); The second long skewed slot 821 along conically shaped 8 barrels angular cutouts direction from inside to outside identical with the swirling eddy direction of conically shaped inside (that is: with the second gas feed pipeline 32 in gas rotation direction d identical); Described the first long skewed slot 811 and the second long skewed slot 821 are set in distance.
When the gas c being flowed into by the first gas feed pipeline 31 moves according to the counter clockwise direction in Fig. 5, due to existence direction many first long skewed slots 811 identical with c direction that crack, so, when dust-contained airflow High Rotation Speed, under the effect of centrifugal force, a part of dust will be centrifuged power and " get rid of " enter the inside of conically shaped 8 and realize separation from the seam of the first long skewed slot 811; In like manner, the dust in the gas being flowed into by the second gas feed pipeline 32 will " be got rid of " to conically shaped 8 outsides from the seam of the second long skewed slot 821, has so just realized pre-separation effect.
The separated dust of dust-contained airflow that is entered into conically shaped 8 inside by the second gas feed pipeline 32 " gets rid of " to the circular outer cylinder 7 of filter and the annular space between conically shaped 8, by the first gas feed pipeline 31, entering dust separated in the dust-contained airflow between filter circular outer cylinder 7 and conically shaped 8 " is got rid of " to conically shaped 8 inner spaces, the dust separating is deposited in the first ash bucket 71 of filter and stores under the effect of gravity, after being regularly discharged into the second ash bucket 72 by ash-valve 73, removes; In the present embodiment, the bottom of described conically shaped 8 is also provided with the anti-back-mixing cover 83 of taper of flaring, for isolating the separated dust of above-mentioned two parts, prevent mutual gas blowby and interference, realized by the way the operating load that reduces screen pipe, reduce the frequency of pulse backblowing deashing, and then reach the object that extends its service life.
In addition, in the present embodiment, owing to being provided with conically shaped 8 in screen pipe outside, and this conically shaped 8 from top to bottom its sectional area constantly reduces, therefore,, when entering the air-flow of conically shaped inside constantly rotation moves downward, its air velocity can constantly be accelerated, so to a certain extent balance the axial flow inhomogeneities (as shown in Figure 6) of screen pipe in filter process, the air-flow also just having improved when screen pipe filters distributes.In like manner, while outwards flowing from screen pipe is inner due to pulse backblowing air-flow, these conically shaped 8 bottoms will be higher than top for the resistance of air pulse, so to a certain extent balance air pulse along screen pipe axial distribution inequality (as shown in Figure 7), be conducive to realize even deashing, and then can reach the service life that extends screen pipe.
Adopt the present invention can reach following beneficial effect for the filter of high temperature gas cleaning:
(1) when there is damaged fracture in screen pipe, the overhead device that is arranged in screen pipe top can stop dusty gas to enter into clean gas chamber, can protect upstream device, and then do not affect subsequent production technique, this overhead device can be conducive to concentrate the energy of purge gas simultaneously, and then improves cleaning efficiency; This overhead device can overcome " backflow " phenomenon existing in prior art, reduces the subparticle that causes due to high speed reflux gas in screen pipe wall and inner embedding or the deposition of wearing, thereby extends the service life of screen pipe.
(2) can carry out pre-separation to entering the dusty gas of filter, reduce the operating load of screen pipe, reduce pulse backblowing deashing frequency, improve the thermal shock that screen pipe is subject to and the thermalfatigue failure bringing and the possibility of fracture, and then extend its service life.
(3) can improve the non-uniform phenomenon that has filtration and Pulse Cleaning in screen pipe running, make the axial dust layer thickness distribution uniform of screen pipe, realize filter operation comparatively uniformly and pulse backblowing deashing, be conducive to the long-period stable operation of filter.
The foregoing is only the schematic specific embodiment of the present invention, not in order to limit scope of the present invention.Any those skilled in the art, not departing from equivalent variations and the modification of having done under the prerequisite of design of the present invention and principle, all should belong to the scope of protection of the invention.
Claims (10)
1. for a filter for high temperature gas cleaning, described filter consists of filter, and the tube sheet of filter is provided with filter element, at least comprises a screen pipe in described filter element; Described tube sheet is divided into the clean gas chamber on top and the dusty gas chamber of bottom by filter seal, and dusty gas chamber is provided with gas access, and clean gas chamber is provided with gas vent; It is characterized in that: filter element upper lid is established an overhead device; Described overhead device includes the cylindrical housing that a bottom fixed cover is located at filter element top, the top of this cylindrical housing is fixed with a porous filter elements, this porous filter elements is provided with a through hole, and pulse backblowing pipeline extends to the inside of this cylindrical housing through this through hole and is positioned at filter element top.
2. the filter for high temperature gas cleaning as claimed in claim 1, is characterized in that: between described dusty gas chamber and overhead device, be connected with differential pressure transmitter.
3. the filter for high temperature gas cleaning as claimed in claim 1, is characterized in that: described screen pipe is sintered metal filtration pipe or ceramic filter tube; Described porous filter elements is made by sintering metal powder, sintered metal mesh, sintered metal fiber or porous ceramic film material.
4. the filter for high temperature gas cleaning as claimed in claim 3, is characterized in that: the porosity of described porous filter elements is 3～8 times of the screen pipe porosity.
5. the filter for high temperature gas cleaning as claimed in claim 1, is characterized in that: described porous filter elements is the central portion identical with cylindrical housing internal diameter; The inwall on contiguous cylindrical housing top is provided with support ring, and this porous filter elements is placed on this support ring, and porous filter elements top arranges a pressure ring, and pressure ring is fixedly connected on the top outer rim of cylindrical housing.
6. the filter for high temperature gas cleaning as claimed in claim 5, is characterized in that: between pulse backblowing pipeline and the through hole of porous filter elements, be provided with sealing ring.
7. the filter for high temperature gas cleaning as claimed in claim 1, is characterized in that: described dusty gas cavity bottom is provided with the first ash bucket; The first ash bucket below is provided with ash-valve, and ash-valve below is provided with the second ash bucket.
8. the filter for high temperature gas cleaning as claimed in claim 1, is characterized in that: pulse backblowing pipeline is communicated in blowback air accumulator by pulse backblowing valve.
9. the filter for high temperature gas cleaning as claimed in claim 1, is characterized in that: described dusty gas chamber consists of a circular outer cylinder, is fixed with a up big and down small conically shaped in circular outer cylinder inside; The upper end outer wall of described conically shaped is fixedly connected with the upper end inner wall sealing of circular outer cylinder, and described filter element is positioned at conically shaped inner side; Described gas access comprises the first gas feed pipeline and the second gas feed pipeline; Described the first gas feed pipeline is connected in circular outer cylinder barrel, and described the second gas feed pipeline is connected in conically shaped barrel through circular outer cylinder; Described the first gas feed pipeline is connected on corresponding barrel in the identical tangential admission mode of rotation direction with the second gas feed pipeline; On the barrel of described conically shaped, along it, be circumferentially with two groups of skewed slot seams, every group of skewed slot seam forms by many long skewed slots that longitudinally arrange along conically shaped; Long skewed slot in the first skewed slot seam group is identical with the swirling eddy direction of conically shaped outside along the cut-out direction of conically shaped barrel ecto-entad; Long skewed slot in the second skewed slot seam group is identical with the swirling eddy direction of conically shaped inside along conically shaped barrel cut-out direction from inside to outside; Long skewed slot in long skewed slot in described the first skewed slot seam group and the second skewed slot seam group respectively interval arranges.
10. the filter for high temperature gas cleaning as claimed in claim 9, is characterized in that: the bottom of described conically shaped is provided with the anti-back-mixing cover of taper of flaring.
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| CN104436918A (en) * | 2014-11-11 | 2015-03-25 | 华北电力大学（保定） | Automatic fail preventing device for ceramic filter |
| CN108754538A (en) * | 2018-07-24 | 2018-11-06 | 重庆国丰实业有限公司 | Aluminum oxide in aluminum electrolytic bath powder draws retracting device |
| CN111068448A (en) * | 2020-01-17 | 2020-04-28 | 中海石油气电集团有限责任公司 | Gas turbine inlet air filtering device and method |
| CN112546736A (en) * | 2019-09-25 | 2021-03-26 | 新疆金风科技股份有限公司 | Air filtering device and air circulating system |
| CN114870532A (en) * | 2022-05-23 | 2022-08-09 | 成都易态科技有限公司 | Ash discharge balancing device and filter |
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